Hi Sherri,

they should definitely be compared in the same version and not across versions. We no longer use the aparc for the cc as it is more accurately labeled in the aseg

cheers, Bruce

On Tue, 14 Jul 2009, Sherri Novis wrote:

Hello -

I am comparing aparc stats across several groups of data, and just noticed that recently processed groups do not have corpus callosum values... which made me wonder if different versions of freesurfer will produce different aparc data...

Can aparc stats from an older version of freesurfer be compared to aparc stats from a more recent version? Or do they all have to be processed with the same version?

Also - we noticed that the aparc areas do not extract in the same order... is this also because of the different version used to process the data?

Thanks much, Sherri

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